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1988 200 hp johnson Using way too much oil

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beattiep

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"smoking at start up, will not

"smoking at start up, will not idle slowly or run well at slow speed.When first crunk up, smoke boils up, but will eventually plane off and run great at high speed till you slow down then does same thing"
 
"Either the VRO needs rebuildi

"Either the VRO needs rebuilding or replacing OR a fuel restriction exists which would cause the VRO to pump less gas but the oil would have the normal flow. The usual cause of a fuel restriction follows.

(Fuel Anti Siphon Valve)
(J. Reeves)

Many of the later OMC V/6 engines incorporate a fuel restriction warning via a vacuum device attached to the powerhead. If the engine overheats, or if you have a fuel restriction, the warning is the same.... a steady constant beep.

NOTE... Only the V/6 & V/8 engines have the above "Fuel Restriction Warning". The warning horn will not sound on the other models.

The fact that a engine is not overheating, but the warning horn sounds off with a constant steady beep, and that the rpms drop drastically would indicate that the engine is starving for fuel due to a fuel restriction. Check the built in fuel tank where the rubber fuel line attaches to the tank fitting. That fitting is in all probability a "Anti Siphon" valve which is notorious for sticking in a semi closed position. It will be aluminum, about 2" long, and the insides of it will consist of a spring, a ball, and a ball seat. If this valve exists, remove it, knock out those inner components which will convert it to a straight through fitting, then re-install it. Hopefully that cures the problem.

The above procedure will cure a restriction problem with the anti siphon valve as stated. BUT, it may also allow fuel to drain backwards to the fuel tank when the engine is not running (siphoning backwards) due to the fact that the carburetors/fuel pump etc are higher than the fuel tank. This condition is not an absolute as the valves in the fuel primer bulb usually prevent this backwards siphoning problem. However.... if this does take place, the cure would be to install a new anti siphon valve.

http://stores.ebay.com/Evinrude-Johnson-Outboard-Parts-etc?refid=store"
 
"i agree w/ joe in the 1st par

"i agree w/ joe in the 1st part mostly, 225 oo J lots of smoke on start up, good ON TE idles rough & excessive smoke on LE HAVE 2 agree vro on the fuel side bad. same exact situation. there r test u can do on the vro 2 prove integrety, but must b knowledgeable.u can by/pass the vro & mix your fuel or just simply rebuild or replace the vro. if u choose 2 bypass & mix your fuel/oil ratio you'll need a new fuel pump. a reputable marine tech can rebuild a vro + labor that will bring positiv results & referals"
 
"Thanks guys, i believe that i

"Thanks guys, i believe that i will replace the vro and take out the antisiphon. But does the antisiphon act as a firewall for my fuel tank?"
 
"thanks again, i have research

"thanks again, i have researched a lot on this motor because i have had just about everything go wrong with it. I have replaced every component except block in the past and have spent hours reading the manual, so i know just enough to be dangerous. the motor has had this problem off and on for 15 years. the vro has been replaced before. one mechanic called omc and told me that my model motor ran too cool and he plugged off some of the cooling to the block per omc. it helped for a while but now is back."
 
Please have in mind that most

Please have in mind that most MECHANICAL failures have their real reason outside the engine.
In Your case I would go through every fuel connection from bottom of tank to VRO. Excessive oil consumption is most often caused by air-leakage in fuel lines or leaking membrane in VRO (not holding pressure).
An other group of items to check are the check-valves in intake manifold.
 
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